Method oe making



C.'T. DICKEX. METHOD OF MAKING TIRES.

MPUCATION FHZED SEPT. 8. 1916' Patented m; 10, 191.9.

"Human STATES PATENT 0FFICE.

cxa'nmis r. menu, or ELIZABETHQNEW JERSEY, aesienon'ro JOHN .1. VOOBHEES,

-. a .12., ormaanr CITY, nxw'mnsm u l'HOD OF MAKIN G TIRES.

mama we. mm, p t t d D 16, 1919.

Application illedfileptemberia ltlt. Serial 10.39;.

To all whom, it may concern:

Be it 'lmowntkat I, Ciuizuie T.- D cxr:r, a citizen of the United States, residing; at Elizabeth in the county of Union and tate and useful Improvements in' Methodaof Making Tires, of which the *following, taken in connection with'the accompanying-drawings, is a ful],1cle ar, and-concise description cal ehape. 1When a'puncture occurs tlLG'IXDI" tion perforated-has a tendeney.;-to-=z.re xal e,

ais-

thus enlarging'thepertoration; lt' has been attempted toobviate j=this diflieulty bynforining a thickenedz-tportion opposite the tread portion, and in more im i oved fo'rin'of ironed yportion'g as i been; laced evenlms their-defect, in' thatthe tllllo lllli'i of cainpreqsion' obtained is more or less limited because the tll'firlfi cylindrically shaped; in crosszswtion, thus' givin thefradial planes-- comprising the. thickene portion the sameradii asv-other rtions of-the tire.

One otthe-oiii production-of a.,ipneumatic tire capable of and a pted to close or sealpunctured.

Anotherlobjectofthe invention is the provision -}of r .;a fldur ii,ble tire constructed andtranaveiilelyisiit'ptdi-that zwhen inflated,

the body portion adimm; the tread is of resisting and automatically closing a puncture. 1- a a Another object of the invention is the provision 'ofafc tire having-a conformation in ma'or and a lILiIiOl' flXiB.

still'further object of the invention is the provision of a tire in which one of the structural features consistingin embedding a, fabric member, inelastic transversely, in the rubber of the tire opposite the tread porwhich theaxes'are;.unequel, i. e., having a tion i;vith the dge thereof adjacent the ects of; this invention is the 1 oil'erinig a very high, resistance to. 1punctu re,

edgesof the tread, and the intermediate por-- .8Xg OS8d-'On'tl16QUtSi esurface; a "of New ersey, have mvented certain-new v he nature of :themeans by which the foregoing and other morespecifieobjectsof theinvention are accomplished'will appear from .the following detailed description.

- *In "the accompanying drawings, wherein similar reference characters-infer to similar parts'throughout'the several .views, Figure 1 IS a pers ctive, partlyinswtiom'ofa inandrel wit l fllfltlle embodying the-features of :tion' of the-tire stripped therefrom. Fig.'. 2 illustrates the tire or tube after reversal when stripped from the mandrel. Fig;- 3 is inflection ofthe article and'aesociatedgparte -=when:used as:a=:t ibe.

-.: this invention formed-thereon, with :a :por-

- The pneumatic:tireccontemplated by this invention 'is so constructed that wheninuse,

a :portion of the.material eomyxisiiig the same .is ;placed under :greatcompression. I

ran to have-a major-and a minor axis, such asan ellipse, buildinga thickened trcadpornLliisi-ais effected by 2 the special i constriiction} i wifthir tire, which :eonsistsin-forming .a tire rtion around one-of the vcrtices, hyvulcaniz- 4 'ingisucecseive layers of-suitable material, such as rubimr,:to-each other,embedding. a transversely inelastic fahriex-memlmr in said :tread portion, preferabl y with apart there- OfflX posed, and removing the; tire-from the wmandrel in a reversedcondition.

Referring nowmore particularlygto-the -di'awings,1thereference character 'l -indi eatesni tire,; oi" an inncrtuhe which iinay 'form a part of a t tire,-ofelastic material, ,suchaas rubber, ,a 3 portion 0 i? this tuhd' being ,-thickcnedp-ns at, v2, said thickened portion greatly compressed, t li'erebyi being capable I -;wliich is formed around one Oftl'ltxVCl'tibQL-l of thQ-Glll[)5(,-ilil(l providing material .for

is substantially inelastic transversely, but

ios

ca able of. slight extensibility longitudina ly. By having a portion exposed in the "manner shown, upon the reversal and inflamandrel 6, and its ends-l become embedded in the rubber, while its central portion contacts with the mandrel 6, which causes this portion to be exposed when the tire is reversed, as clearly shown in Fig. After placing the fabric member in position, additional layers of rubber are vulcanized around it in such a manner as to form a thickened portion, which is-intended to comrise the tread of the tire. When the tire as been completely built, it is stripped from themandrel, at the same time turning it inside out, as shown in Fig. 1. The; tire, when not inflated, may assume ashape such as shown in Fig. 2. -When it isii-nl'latechas shown in Fig. 3, the fabric member 3 causes the material or rubber adjacent -thereto'to be placed .under great compressionon the inside, thus being capable of offering great resistance to puncture and automatically sealing a puncture-which may occur.

From the above description it will be apparent that by constructing-the tread portion of the tire with smaller radii thanthe main body portion, greater compression restilts when the 'tire 1s= inflated than-would be obtained if the'whole tir had substan'- tially the same radii, as would be the case if cylindrically shaped transversely;

It is also' obvious that the radial plane occupied by the fabric member is-quite a determiningfactor' in producing a given compression, since it is inelastic .trans- ,versely, and the greater the mass of rubber underneath, or opposite thereto, the greater the compression. In other words, if the fabric was centra'll. located transversely in the thickened portion of-the tire, the com peesslon obtained upon inflation would not terme portion of the fabric is exposed in the manner illustrated: i

7 While I have'described my invention with reference to the specific embodiment shown,

it is obvious that various changes in detail .drel. I z

4. A step m the method of building-" ameumatic tire (-onsisti'ng'in fornnn'g-a'tire as t as that obtained whenrthe-in-- I claim as new herein and desireto secure by Letters Patent i. 1 v

1. The methodof making a pmnunatic tire which consists in forming a tire body upon a mandrel transversely elliptically shaped, building, a thickened tread portion by vulranizing successive layers of rubber to each other, embedding a transversely inelastic fabrnmember in said trawl-portion in a manner so as to bring its edges near the surfa e of said tread ortion with its intermediate portion describing a curve having a dillereni' radial length than that of the tread portion, and turning said tire inside out when removing it from said mandrel.

2. A step in the ureth al of makinga pneumatic tir which consists in forming a tire body upona mandrel transversely elliptirally sliapwh-aml building a thickened tread" portion about one of the vcrti'ccs thereof and from the mandrel. i 3. A step in the method of makinga pneu turning said tireinside out andremoving'it I 85. n|ati c tire, which consists informing a tirebody upon a fmandrel transversely ellipti- (cal l y shaped, building a thickened tread poition about one' of the vertices thereof andemhedding a transversely inelastic f abric member in said tread portion ln-a manner so that the plane'occupied by the said an ric is eccentric to the radial lanes occupied-' by the material formingfsai thickened por tion and in stripping the tire from the mantion and materially increasing the thickness of the tread portion of the tire'aboutonb' of.-the relativelynarrow 'verti'cespf the mamdrel and in turning' sa'id tirefiih'side out, when removing it'from the mandrel.

5. A step inl'the method ofa'buildin'ga ppcumatic tire consisting. in forming n tire dy upon a mandrel of elliptical forma tion and materially increasing'the thickness of the tread portion of the tire about one of the relatively narrow vertices of themaridrel, and embedding" in the thickenedtread portion of the tire-a tread compressing mein ber andin turning said tire inside ooh-when removing it from the m'andrelfl 6. A stepin the method of making apneamatic tire which consists in forming ,a tire body upon a curved surface liiandlel haiiing mayor and minor diameters; and increasing the thickness of the tread portion of the tire about one of ,the relativelyjnarrow portions of the 'mandrel, and removing the tire from the mandrel.

cH RLEsfr. money.- 

